Five shootings in Sydney overnight

DETECTIVES charged with the task of bringing down organised crime in NSW were tested in Sydney overnight as shots were fired into homes and businesses around the city.

Police have confirmed tension between outlaw motorcycle gang members is behind at least four of the five shootings reported in the early hours of Tuesday morning.

Officers from Sydney's Gang Squad have been assigned to Strike Force Kinnarra to investigate the shootings at a home and a business at Merrylands, a shop at Baulkham Hills and a home at Granville.

Preliminary investigations suggest the shootings stem from an ongoing conflict between the Hells Angels and Nomads bikie gangs.

Police are yet to confirm if a fifth shooting at Northmead is linked.

State Crime Commander, Acting Assistant Commissioner Mal Lanyon, said police were once again facing a "wall of silence" when questioning witnesses and victims.

"There are members of the community who have information about these shootings and the people involved," Mr Lanyon said.

"We also know there are members of these groups out there who don't agree with the violence being used. I encourage these people to provide that information to police. That information can be provided anonymously.

"There is no doubt that these shootings are all about the conflicting groups sending a message to each other, but they are reckless acts of violence.

"In addition to the investigative component, Strike Force Kinnarra will also have a strong proactive component involving Strike Force Raptor, the Middle Eastern Organised Crime Squad and members of the metropolitan regions who will target specific locations and OMCG members and their associates throughout Sydney."